We can't be sure, of course, that Lamar Odom's absence from his sister-in-law's sweet 16 party means it has anything to do with the allegations that he had a year-long affair with a lady named Jennifer Richardson! It IS kinda wack either way, though!

Plus, it's only just a few days after lawyer Polina Polonsky claimed she also hopped on the Lamar train for a six-week affair this summer!

Kylie Jenner just had her 16th birthday, and it looks like Lamar wasn't the only one who didn't show up! BothKim and Kanye were nowhere to be seen (well, Kanye was boating around a different country), which means little Nori wasn't in attendance either!

Whatever happened to family support??

Kourtney WAS there, along with Scott Disick, regardless of male model Michael Girgenti filing a paternity lawsuit against her, claiming he is her son Mason's real daddy.

At least she had fun amidst all this scandal, and Khloe was there even without Lamar! Here's what Kylie tweeted:

Thank you to everyone for the bday wishes and making yesterday so special! Blessed!